System and method for managing a cumulative DC offset in a magnetizable material. A primary driving AC voltage and a magnetic flux sensor. The flux sensor output is continuously received into memory while the flux sensor output for each phase half-cycle is processed to continuously compute and re-compute in real time a flux-second integral for each half-cycle. The two half-cycle flux-second integrals are compared to each other for a DC offset value and the offset value drives a slow loop DC compensation circuit to steer a PWM control.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The system of claim 1 wherein the magnetizable material is a transformer core.
3. The system of claim 2 wherein the magnetic flux sensor is disposed within a bore in the transformer core.
4. The system of claim 1 further comprising an electrically isolated, self-powered flux sensor.
5. The system of claim 4 further comprising fiber optic signal transmission from the flux sensor to the microprocessor.
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August 29, 2023
July 30, 2024
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